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Welcome to the Peripherals and Interfacing with 8086 MCQs Page

Dive deep into the fascinating world of Peripherals and Interfacing with 8086 with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Peripherals and Interfacing with 8086, a crucial aspect of Microprocessor. In this section, you will encounter a diverse range of MCQs that cover various aspects of Peripherals and Interfacing with 8086, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Microprocessor.

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Peripherals and Interfacing with 8086 MCQs | Page 10 of 11

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Q91.
The sensor RAM acts as 8-byte first-in-first-out RAM in

a.

keyboard mode

b.

strobed input mode

c.

keyboard and strobed input mode

d.

scanned sensor matrix mode

Discuss
Answer: (c).keyboard and strobed input mode
Q92.
The registers that hold the address of the word currently being written by the CPU from the display RAM are

a.

control and timing register

b.

control and timing register and timing control

c.

display RAM

d.

display address registers

Discuss
Answer: (d).display address registers
Q93.
When a key is pressed, a debounce logic comes into operation in

a.

scanned keyboard special error mode

b.

scanned keyboard with N-key rollover

c.

scanned keyboard mode with 2 key lockout

d.

sensor matrix mode

Discuss
Answer: (c).scanned keyboard mode with 2 key lockout
Q94.
The mode that is programmed using “end interrupt/error mode set command” is

a.

scanned keyboard special error mode

b.

scanned keyboard with N-key rollover

c.

scanned keyboard mode with 2 key lockout

d.

sensor matrix mode

Discuss
Answer: (a).scanned keyboard special error mode
Q95.
When a key is pressed, the debounce circuit waits for 2 keyboard scans and then checks whether the key is still depressed in

a.

scanned keyboard special error mode

b.

scanned keyboard with N-key rollover

c.

scanned keyboard mode with 2 key lockout

d.

sensor matrix mode

Discuss
Answer: (b).scanned keyboard with N-key rollover
Q96.
The data that is entered from the left side of the display unit is of

a.

left entry mode

b.

right entry mode

c.

left and right entry modes

d.

none of the above

Discuss
Answer: (a).left entry mode
Q97.
The FIFO status word is used to indicate the error in

a.

keyboard mode

b.

strobed input mode

c.

keyboard and strobed input mode

d.

scanned sensor matrix mode

Discuss
Answer: (c).keyboard and strobed input mode
Q98.
The flag that increments automatically after each read or write operation to the display RAM is

a.

IF

b.

RF

c.

AI

d.

WF

Discuss
Answer: (c).AI
Q99.
If any change in sensor value is detected at the end of a sensor matrix scan, then the IRQ line

a.

goes low

b.

goes high

c.

remains unchanged

d.

none of the above

Discuss
Answer: (b).goes high
Q100.
Which of the following is not a mode of data transmission?

a.

simplex

b.

duplex

c.

semi duplex

d.

half duplex

Discuss
Answer: (c).semi duplex
Page 10 of 11

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